Renton, Robert Norman. <br/><br/>
The international telex service / 
R. N. Renton. 
 - London :  Pitman,  1974. 
 - 420 p. :  ill. 
<br/><br/><label>ISBN: </label>0273252399 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems.<br/>Teletype.